Prominent German writer Gunter Grass, who was recently brought into the spotlight over criticism of Israel’s nuclear weapons program, has been hospitalized with heart problems. Grass was admitted to hospital in Hamburg on Monday. The 84-year-old Nobel laureate published the poem “What Must Be Said,” in which he criticized what he called Western hypocrisy over Israel\'s nuclear program, and labeled the country a threat to an \"already fragile world peace\'\' over its stance towards Iran. The move sparked an outcry from Tel Aviv, which announced him \"persona non grata\" on Israeli territory.